Besides the number of varieties of potatoes being reduced what else is reduced by this practice

I believe it is the the potato gene pool 

The correct answer is a. we know this because n (hap) + n (hap) = 2n (dip).

You should provide a picture to show where the arrow is pointing and which information that is given. but there are 3 branches of the government, legislative, executive, and judicial. legislative makes laws, executives pass laws, and judicial are the courts